devicetree: bindings: Document Krait/Scorpion cpus and enable-method

Scorpion and Krait don't use the spin-table enable-method.
Instead they rely on mmio register accesses to enable power and
clocks to bring CPUs out of reset. Document their enable-methods.

Cc: <devicetree@vger.kernel.org>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
[sboyd: Split off into separate patch, renamed methods to
match compatible nodes]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Kumar Gala <galak@codeaurora.org>

1 files changed, 24 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
index 91304353eea4..333f4aea3029 100644
--- a/Documentation/devicetree/bindings/arm/cpus.txt
+++ b/Documentation/devicetree/bindings/arm/cpus.txt
@@ -180,7 +180,11 @@ nodes to be present and contain the properties described below.
                           be one of:
                              "spin-table"
                              "psci"
-                        # On ARM 32-bit systems this property is optional.
+                        # On ARM 32-bit systems this property is optional and
+                          can be one of:
+                            "qcom,gcc-msm8660"
+                            "qcom,kpss-acc-v1"
+                            "qcom,kpss-acc-v2"
 
         - cpu-release-addr
                 Usage: required for systems that have an "enable-method"
@@ -191,6 +195,21 @@ nodes to be present and contain the properties described below.
                           property identifying a 64-bit zero-initialised
                           memory location.
 
+        - qcom,saw
+                Usage: required for systems that have an "enable-method"
+                       property value of "qcom,kpss-acc-v1" or
+                       "qcom,kpss-acc-v2"
+                Value type: <phandle>
+                Definition: Specifies the SAW[1] node associated with this CPU.
+
+        - qcom,acc
+                Usage: required for systems that have an "enable-method"
+                       property value of "qcom,kpss-acc-v1" or
+                       "qcom,kpss-acc-v2"
+                Value type: <phandle>
+                Definition: Specifies the ACC[2] node associated with this CPU.
+
+
 Example 1 (dual-cluster big.LITTLE system 32-bit):
 
         cpus {
@@ -382,3 +401,7 @@ cpus {
                 cpu-release-addr = <0 0x20000000>;
         };
 };
+
+--
+[1] arm/msm/qcom,saw2.txt
+[2] arm/msm/qcom,kpss-acc.txt